10-16-2008, 07:16 AM #1
OT - Old School Powered Kilo Record
I thought you guys might be interested. We made a mad dash trip from Niagara Falls, NY to Lincoln City, OR last weekend to try for the APBA Kilo Record in the 1 litre Modified class (see my avitar).
This boat is powered by a GP1200 ( 65U - modified) and limited to a single expansion chamber by the rules. We run the stock Yamaha exhaust. We routinely turn it 8200 RPM.
We set the record with a 2 pass average of 111.634 MPH Our second pass was almost 113 MPH ! Unfortunately I forgot to turn the G2X datalogger on so we don't have peak speed numbers to share.
It was pretty scarey as the boat was pretty much off the water through the entire runs. Felt like a 2 MPH wind gust would have sent me over.
Driver Y-1 "Fast Eddie"
10-16-2008, 07:51 AM #2
Awesome! I love the snappy 65U.
10-16-2008, 07:56 AM #3
which further supports the point that a prop-ski is the way to go
10-16-2008, 08:00 AM #4
10-16-2008, 08:02 AM #5
10-16-2008, 08:04 AM #6
10-16-2008, 10:11 AM #7
Our rules limit us to 1160 cc's. The 1200R comes in over that. There are a couple of guys who have destroked the R motor to come in under 1160 CC'c but to this point they are not quite as fast as we are. I expect that ultimately that engine will be better from what I have heard and read but at this point the 65U combo is very competative. The R engine is quite a bit heavier than the 65U which may play into the reason that the R to this point isn't as fast as the U on a closed course.
The kilo is run with pretty much as long of a runup before the trap as you want. I probably entered the trap at about 108 MPH and accellerated through the trap to around 115 MPH for the 111 MPH average. Keeping the boat on the water is the real challenge.
10-16-2008, 12:11 PM #8
Thanks for the information. The pipe on the GPR is where most of the weight comes from.
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